Coffee or spice mill



- (N9 Model.) 3v Sheets-Sheet 1.

v 0. 0. GLAWSON. I

COFFEE OR SP IGE MILL.

":No. 599,890. v. P'aQteIited Ma-r. 141 898.

EII/QHIKIIIHIVHIHI INVENTOR a 995mm 9.9999999 (No Model.) 4 3 swa -Shea 2.

' C. C. CLAWSON.

COFFEE 0R SPICE MILL' No. 599,890. Pa'tgnted Mar. 1,.1898.

INVENTOR mcumm BY M? s Shets- Sheet 3.

, (No 'Modl.)

C U CLAWSON COFFEE 0R SPICE MILL.

Patented Mat. 1, 1898.

WITNESSES: INVENTOR 0; CLEMENT a. cmwsem '4 w jnonw I clear, and exact description'of theinven'tion,

' described, and finally embodied in the clauses crating in bearings in said shells, and a pair for cleaning.

1 UNITED; STATES.

PATENT ()FFICE.

CLEMENT O. CLAWSON, OF NEWARK, NEW JERSEY:

COFFEE OR SPlCE MILL.

SPECIFICATION forming part of Letters Patent No. 599,890, dated March 1, 1898.

Application filed March 20, 1897.

To all whom it may concern:

Be it known that I, CLEMENT O. OLAwsoN, a citizen of the United States,residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Coffee or Spice Mills; and I do hereby declare the following to be a full,

such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to, letters of reference marked thereon, which form apart of this specification.

This invention has reference to improvements in mills for grinding coifee, spices, or the like; and the primary object of the invention is to provide an improved construction of mill, comprising a pair of adjustable shells having grinding-surfaces, a rotary shaft opof runners detachably but operatively ar ranged on said shaft, said runners being provided with grinding-surfaces, whereby a construction of grinding-mill is the result, the parts of which can be more readily and cheaplymade, quickly assembled in operative position upon the shaft, and readily separated Another object of this. invention is to provide a mill of the character hereinabove stated, having separable shells, comprising a hopper at the top and a discharge opening or mouth at the bottom, said shells being separably and adjustably connected, first, for cleaning the inner parts ofthe mill, and, secondly, for adj ustingthe parts for coarse or very fine grinding.

The invention therefore consists in the novel construction of mill hereinafter set forth and in the arrangementof the two-part shells, forming when secured together a combined casing for the grinding-runner, a hopper above the same, and adischarge opening ormouth at the bottom; also, in a means for adjustably connecting said shells, and, furthermore, in such novel arrangements and combinations'of parts to be hereinafter fully of the claim.

The invention consists, further, in certain Serial No. 628,416. (No model.)

special constructions of parts not hereinabove mentioned, but which will be hereinafter set forth.

The invention is clearly illustrated in the accompanying drawings, in whichview of the inner portion of one of the shells;

and Figs. 8 and 9 are perspective views of one of the runners and the shaft, respectively. Similar letters of reference are employed in all of the above-described views to indicate corresponding parts. Y

As will be seen from the several figures of the drawings, the mill comprises a pair of shells a and a, of any proper shape and configuration in outline, one of said shells, as a, having a recess (1 along its edges, into which extends and is adjustably arranged therein a tongue-like edge a of the shell or, as will be more especially seen from Fig. 3. The shell a is provided with a screw-threaded hole a and preferably with an enlargement of, while the shell a has a correspondingly-an ranged hole a and is also preferably provided with an enlargement or boss a Passing through said hole a is an adj usting-screw I), having a finger-piece b for turning its screwthreaded end 12 into the threaded hole a in the shell a, whereby the two shells at and a can be secured together edge to edge,'as indicated in Figs. 3 and 4, to form the hopper A, the casing A for the grinding-runners, and the discharge opening or mouth A Each shell a and a is formed with a bridgepiece a made to overlap, as shown in Fig. 4, when the two shells are secured together, said pieces a being provided with the downwardly-extending portions or walls of, form.-

Fig. 5 is a face view of the device with ing suitable openings a through which the A illustrated. The inner surfaces of said bridge pieces a are also formed with suitable grinding-surfaces a, substantially as represented in Figs. 4 and 7.

As will be seen from the several figures of the drawings, the shell a is provided with suitable legs a and a connecting-base a, preferably provided with perforated lugs a, as shown in Fig. 3, for attaching the mill to a table, bench, or the like.

The shell to is provided with a suitable bearing portion (0 and the shell a with a bearing portion a, in which is rotatively arranged an operating-shaft (I, having a flywheel d and operating-handle (1 secured to said shaft by means of a screw d passing in the usual manner through the huh (I of said fiy-wheel, as clearly shown in Figs. 3 and t. The said shaft d is provided with a suitable hub (1 formed integral with the shaft proper, or it may be made separate therefrom and secured to the shaft in any well-known manner, said hub being provided on its cylindrical surface with outwardly-extending projections or teats d and d as will be clearly evident. Detaehably arranged upon the said hub of the shaft (1 are a pair of disks c and c, which form the grinder-runners of the mill, said disks being vertically placed upon the shaft d and moving with the same when it is operated. Each grinder-runner has a central perforation or hole 0 and a surrounding hub 0 said runners being also provided with suitably-formed grinding-surfaces 0 substantially as illustrated in Figs. 4 and 5. Upon the circumferential edge of each disk 0 and c are suitably-spaced projections or lugs c and an annular ledge 0, extending from one side at or near the said edge of the disk. Said lugs 0, when the shaft dis turned to operate the grinding-disks, move in very close proximity to the grinding-surfaces a and are for the purpose of pushing or forcing the ground material along the annular surfaces 0 of the disks 0 and c to prevent the clogging of the ground material in the machine and to force it down into the delivery-opening. Upon the inner surface (2 of each disk are certain projections 0 with intervening spaces 0 formed between them, substantially as illustrated in Fig. 8.

To secure the several parts of the mill together, the disk 0 is placed upon the hub d on the shaft 61, so that the projections or teats d on said hub fit into the spaces 0" between the projections c on the disk, and the surface 0 of said disk is snugly fitted against the edge of said projections or teats d. The end d of said shaft (1 is then pushed through the bearing a in the shell a, and the fly-wheel cl and its operating-handle (I then secured in operative position upon the said end of the shaft. The other disk 0 is then slipped over the end (1 of said shaft d, bringing the projections c on said disk over the hub (Z and fitting the projections or teats (1 into the spaces 0 between said projections c on said disk 0, and in this manner both said disks 0 and c are operatively, but also detachably, held in position on the said shaft (1. \Vhile in these positions upon the said shaft the annular ledges c of both disks are made to abut, as indicated in Fig. 4, and a complete grinding-runner will be the result, as will be clearly evident. The other shell a of the mill is then placed over the end d of the shaft (Z and its tongue-like edge a fitted into the recess a of the shell a and then secured in position against the other shell by means of the bolt or red 1), hereinabove mentioned, and in the manner previ ously described. By the use of three or more projections d on one part of the hub (l on the shaft d the one grinding-disk is capable of a rotative adjustment on said hub to bring the lugs c on the two disks 0 and 0 either directly opposite one another or to bring them in alternate positions on their respective disks, whereby the spaces between any two consecutive lugs c on the ledges c of the two disks 0 and 0 may be made larger or smaller, as

necessity may demand in grinding diiferent kinds of materials. By tightly screwing up said bolt or rod 1) the two shells a and a, as well as the disks 0 and c, are brought close together, whereby the spaces between their respective grinding-surfaces can be made very small to cause the particles of the material to be ground very fine, or by partially unscrewing said bolt or red b the distances between said grinding-surfaces can be enlarged, and a more coarse grinding of the material will be the result, which can be regulated according to the desire of the operator by turning said screw or bolt in the proper direction. The said bridge-pieces a mentioned in the above, which are preferably cast integral with the shells a and a, separate a portion of the hopper A from the casing A, surrounding the grinding-runners, and prevent the material to be ground from getting upon the upper portions of said runners and properly guide the material between the grinding-surfaces of said runners and said shells to and a; but said bridge-pieces, while desirable, are not absolutely necessary.

I may use in connection with my novel con struction of mill a suitable cup 6, which can be placed beneath the discharge opening or mouth of the mill, as indicated in Figs. 2 and 4, or said cup may be placed upon the top of the hopper to serve as a cover for the mill, as clearly illustrated in Fig. 1.

By my novel arrangements and constructions of the parts herein described many advantages are the result, and a simple, useful, and cheap construction of grinding-mill is provided.

Many changes may be made in the arrangements and combinations of parts and the details of construction thereof without departing from the scope of my present invention. Hence I do not limit my present invention to arranged over said boss d and said teat-s or projections fitting into said spaces, said disks being capable of a rotative adjustment on said boss d and lugs c onthe peripheral surfaces of said disks, substantially as and for the purposes set forth.

2. In a grinding-mill,the combination, with the casing thereof, of ashaft, having: aboss d and teats or projections on said boss, and a grinding-runner, comprising a pair of disks having projections c and intervening spaces 0 arranged over said boss a and said teats.

or projections, fitting into said spaces and holding said disks in lateral sliding engagement with the projections on said boss (1 and said disks having abutting ledges 0 substantially as and for the purposes set forth.

In a grinding-mill, the combination, of

. an adjustable two-part casing, and a screwthreaded rod or bolt connected with said parts of the casing for adjustably securing them tothis 16th day gether, bearing portions in-said parts, a shaft in. said bearings, having a boss 61 and teats or projections on said boss, and a grindingrunner, comprising a pair of disks having projections c and intervenin g spaces 0 arranged over said boss 01 and said teats 0r projections fitting into said spaces, and lugs c on the peripheral surfaces of said disks, substantially as and for the purposes set forth.

4. In a grinding-mill, the combination, of an adjustable two-part casing, and a screwthreaded rod or bolt connected with said parts of the casing for adj ustably securingthem together, bearing portions in said parts, a shaft in said bearings, having a boss 01 and teats o'r projections on said boss, and a grindingrunner, comprising a pair of disks having proj ections c and intervening spaces 0 arranged over said boss d and said teats or projections, fitting into said spaces and holding said disks in lateral sliding engagement with the projections on said boss (1 and said disks having abutting ledges 0, substantially as and for the purposes set forth.

In testimony that I claim the invention set forth above I have hereunto set my hand of March, 1897.

CLEMENT O. CLAWSON. Witnesses:

FREDK. G. FRAENTZEL,

WM. C. GAMFIELD, Jr. 

